Process of regenerating and purifying air.



.No. 853,402. PATENTED MAY 14, 1907. R. v. FOREGGBR & G. F. BRINDLEY. PROCESS OF REGENERATING AND PUR IFYING AIR.

APPLICATION FILED KAILQ. 1906.

ENE/1 ATTORNEY W/TNESSES: i J

No. 853,402. PATBNTED MAY 14, 1907.

R. v. FOREGGER & G. F. BRINDLEY. PROCESS OF REGENERATING AND PURIFYING AIR. APPLICATION FILED MAB-.9. 1906.

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0 00/? Cane o xyenan-w 4 54 0/909592 k/gg g Qwazgi' wyyen Garre No. 853.402. PATENTED MAY 14, 1907.

R. v. POREGGER & G. F. BRINDLEY.

PROCESS OF R'BGBNERATING AND PURIFYING AIR. APPLICATION TILED MAR. 9. 1906.

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O o o O i V m [I], a E a produce the desired reaction, the only neces-x; sary reagent being such degree of humidity in baled-by living beings.

I tion, the other'toxic'tportionsiremaininglum v changed orunaffectef.

' and the-purifying functions, that is, the supplyin of OX en; the absorption of carbon alkaline peroxid, or mixtures containing the the past been partially accomplished by -car UNITED STATES";

RIOlIARD-VQFOREGGER, OF NEW YORK, N; Y., AND GEORGE FRED BRIND- ONTARIO, CANADA, ASSIGNORS TO THE ROESS- LEY, OF N lAGARAiFALLS,

PATENT OFFICE.

LER & nAssLAoHER CHEMICAL COMPANY, or NEW YORK, N. Y., A 00R- PORATION OF NEW YORK.

PROCESS OF REGENERATING AND PLlRIFYING AIR.

To all whom, it may concern: v y

Be it known that we, RICHARD VON'FO REG- GER, a subject of the Emperor of Austria] and a resident of New York city, New York, and GEonGnFREn BRINDLEY, a subject of the King of Great Britain, anda -resident of Niagara Falls, Province of Ontario, Canada, have invented a certain new. and useful Proc: ess of Regenerating and Purifying Air; of which the following is a specification. v

Our invention relates -to a process for the regeneration.- and purification ofair in which the vitiated-air is caused to pass over a suit-' able compound adapted to generate oxygen and at the same time absorb or purify the toxic parts of the vi'tiated air.

The compound we prefer to use .is afused same, and particularly fused sodium peroxid; No artificial reagent is necessary to the air as would be normally found in air ex .,.One application of our invent'onwould be in connection with the constant and. aut'ornatic regeneration and purification of aici'n asubmarineboat', or similar closed; chamber. With relation to the regeneration and urification of air in submarine boats this "as in,

ryingiheavy cylinders of compressed air or": oxygen to re lace the amounts used up; the; fouled air belng'exhausted through the propeller shaft, -or;th-,carbon dioxid portion. above absorbednby a caustic alkaline fsolu- .ion. a cons derable reduction v in weight-is obtained andv a simplification 'in that one means fulfils'both the regenerating 'By. our inven dioxi and t e purifying the air of its "other" toxic constituents, the continuous mainte nance ofox genan'd carbon dioxid the limits ed""'by nature being accomplished with completecertainty.

.When air containing moisture andvcarbon dioxid is drawn .or passed over'a fused alka- I line peroxid, for instance fused sodium per-i oxid, the moisture of the air reacts with the Specification of Letters Patent. Application filed March 9,1906. SQrlElNO. 305,143.

I remain which" enouglh 'senjtatijon' of curves-showing the results of v I Patented compound settingilfree I I. N w ib-i54 Li 2N e Iji r Qi qa-'-1Na ni+ q W h folilidthat wheres inse s 'of carbondioxid present in the air after thi action has" been going 'onfor some time the alkaline peroxidf becomes. coated with carbonate orbi-carbona te and finally the mac tionfreeing'oxy en and absorbing carbon dioxid ceases, hus this practice of dra'w'' ing or passingthe air over alkaline peroxid could only be used in places where humidity without any considerable amount of carbon .dioxid is present; This is illustratedby the following eri periment z An electrically driven blower was tted at the discharge. end .with a "cylinder largee'nough to hold several pounds "of peroxidin lumps of one-half to. one

inch cube. When operating the blower in a through crevices in t e windows,

circulation prevailed 1 (an, the reaction of themoisture on ithe peroxid was a nt inuous one without the formation of. a 11st. of carbonates.

I 8o I Figure l is a side e1eva -tion parj'tly'in, section, and Fig. 2 is a front elevation of one form of'app'aratus adapted \IgS..

the experiments hereinafte "atlngor process. Several rabbits w @Ii y e-.. tail -ai s an ed-at fre- 'j%uen t intervals; .The, curve il ustrated ig. 3 shows the-decrease of oxygen and inabove described comprisectrically driven blower having the 'pl'acedin the box with the rabblts and opcrfore. "The curve illustrated-in laced yinvfan air. tight box ,3x3x6 feet 5 *ated-and the contained-ainanagjed a; be- V 4 s ows Io continuous reaction with the moist air.

ing a fixed cylinder 2 attached to the disthe .results thus obtained. It will be observed that the air was kept fresh longer than in the experiment where no regenerative apparatus was used. Nevertheless the air was not kept perfectly pure, and we discovered that this was due to the formation of a crust or coating of carbonate or bi-carbonate of sodium on the surface of the lum s of peroxid, as described, which prevente the discovered that by providing means whereby the alkaline carbonate or bi-carbonate may be continuously removed from the peroxid the reaction by which the oxygen is set free and carbon dioxid absorbed proceeds with.

out interruption. We shall describe one I method of accomplishing this result, but it is understood that we do not confine ourselves to this method as it is only-illustrative.

In Figs. 1 and 2 is shown a blower I havchar e end 3 thereof. Suitably journaled within the cylinder on bearings 4 and 5 1s a a cage 6 of wire netting adapted to be partly a 5 filled with lumps. of the peroxid. A gear 7 is adapted/t be actuated in any convenient manner fo' turning the cage 6 and thus tumbling the ""contents thereof. In turning the cage, 6, either continuously or intermittently,' the tumbling around of the pieces of eroxid will remove the carbonate crust. T e loose or used portion of the mass, being partly caustic soda and artly sodium carbonate, a moist state, wi 1 drop through the nett' 3 5 of the cage 6 into cylinder 2 where it will stil bon dioxid, and purity of the air, with the exception of the. temperature which was higher than at the start, were kept almost constant from the beginning. We have also discovered that we can regulate the amount 5'0 of oxygen in the air, either increasing it above normal or letting it o below normal, byregulating the speed of rotation of the cage containing the peroxid or by regulating the removal of the crust of carbonate or bicarbonate from the peroxid.

, In connection with the apparatus it may sometimes be desirable'to regulate the 1no1sture in the air by any suitable means, such as 3y placing water in the lower part of cylin- It is obvious that many means of practicthe air .of a chamber consisting in passingsaid air in a continuous stream under pressure over an alkaline peroxid in a solid state whereby the humidity of the air may react with the peroxid to free oxygen and absorb carbon dioxid.

2. A process of I'ege crating and purifying the air of a chamber, .said air containing moisture, consisting in passing said air in a continuous stream under pressure over fused sodium 'peroxid in a solid state.

3-. A' process of regenerating and purifying the air of a chamber, said air containing moisture, eonsistingin passing said air in a continuous stream under pressure over an alkaline peroxid in a solid state while agitat-- ing the peroxid. V

4. A process of regenerating and purifying air consisting in the generating of oxygen gas and the absorbing of carbon dioxid by the reaction of the humidity contained in the air alone on sodium peroxid in a solid state while agitating the peroxid.

'5. A recess of regeneral ing and purifying air, sai air containing moisture, consisting in passing said air in a continuous stream under pressure over an alkaline peroxid in a solid state while agitating the peroxid andregulats ing' the generation of oxygen by the relative agitation of the pcrox-id.

In witness whereof we have hereunto described our'invention what we signed our names in theipresenee of two subscribing witnesses.

' RIC'I'IARD v. reassess. I

GEURGE FRED BRINDLEY.

Witnesses:

SEABURY C. MASTIGK, ROBERT W. AsuL'EYs. 

